vscode-api-cn.js/assets/css/setup/_icons.scss

$type-icons: (object-literal), (class), ("class.tsd-has-type-parameter"),
    (interface), ("interface.tsd-has-type-parameter"), (namespace, module),
    (enum), (enum-member), (signature), (type-alias),
    ("type-alias.tsd-has-type-parameter");

$member-icons: (variable, property), (get-signature), (set-signature),
    (accessor), (function, method, call-signature),
    ("function.tsd-has-type-parameter", "method.tsd-has-type-parameter"),
    (constructor, constructor-signature), (index-signature), (event), (property),
    (function, method, call-signature), (event);

// parameter
// type-literal
// type-parameter

.tsd-kind-icon {
    display: block;
    position: relative;
    padding-left: 20px;
    text-indent: -20px;

    &:before {
        content: "";
        display: inline-block;
        vertical-align: middle;
        width: 17px;
        height: 17px;
        margin: 0 3px 2px 0;
        background-image: url(../../images/icons.png);

        @include retina {
            background-image: url(../../images/icons@2x.png);
            background-size: 238px 204px;
        }
    }
}

.tsd-signature.tsd-kind-icon:before {
    background-position: 0 -153px;
}

$icon-size: 17px;
$type: -0 * $icon-size;
$type-protected: -1 * $icon-size;
$type-private: -2 * $icon-size;
$member-class-public: -3 * $icon-size;
$member-class-public-inherited: -4 * $icon-size;
$member-class-protected: -5 * $icon-size;
$member-class-protected-inherited: -6 * $icon-size;
$member-private: -7 * $icon-size;
$member: -8 * $icon-size;
$member-protected: -9 * $icon-size;
$member-enum: -10 * $icon-size;
$member-enum-protected: -11 * $icon-size;
$member-interface: -12 * $icon-size;
$member-interface-inherited: -13 * $icon-size;

@for $index from 1 through length($type-icons) {
    @each $kind in nth($type-icons, $index) {
        $selector: ".tsd-kind-" + $kind;
        $offset: -#{17 * ($index)}px;

        #{$selector} {
            > .tsd-kind-icon:before {
                background-position: $type $offset;
            }

            &.tsd-is-protected > .tsd-kind-icon:before {
                background-position: $type-protected $offset;
            }

            &.tsd-is-private > .tsd-kind-icon:before {
                background-position: $type-private $offset;
            }
        }
    }
}

@for $index from 1 through length($member-icons) {
    @each $kind in nth($member-icons, $index) {
        $offset: -#{17 * ($index - 1)}px;
        $selector: ".tsd-kind-" + $kind;
        @if $index == 10 {
            $selector: ".tsd-is-static";
        } @else if $index > 10 {
            $selector: ".tsd-is-static.tsd-kind-" + $kind;
        }

        #{$selector} {
            > .tsd-kind-icon:before {
                background-position: $member $offset;
            }

            &.tsd-is-protected > .tsd-kind-icon:before {
                background-position: $member-protected $offset;
            }

            &.tsd-is-private > .tsd-kind-icon:before {
                background-position: $member-private $offset;
            }

            &.tsd-parent-kind-class {
                > .tsd-kind-icon:before {
                    background-position: $member-class-public $offset;
                }

                &.tsd-is-inherited > .tsd-kind-icon:before {
                    background-position: $member-class-public-inherited $offset;
                }

                &.tsd-is-protected > .tsd-kind-icon:before {
                    background-position: $member-class-protected $offset;
                }

                &.tsd-is-protected.tsd-is-inherited > .tsd-kind-icon:before {
                    background-position: $member-class-protected-inherited
                        $offset;
                }

                &.tsd-is-private > .tsd-kind-icon:before {
                    background-position: $member-private $offset;
                }
            }

            &.tsd-parent-kind-enum {
                > .tsd-kind-icon:before {
                    background-position: $member-enum $offset;
                }

                &.tsd-is-protected > .tsd-kind-icon:before {
                    background-position: $member-enum-protected $offset;
                }

                &.tsd-is-private > .tsd-kind-icon:before {
                    background-position: $member-private $offset;
                }
            }

            &.tsd-parent-kind-interface {
                > .tsd-kind-icon:before {
                    background-position: $member-interface $offset;
                }

                &.tsd-is-inherited > .tsd-kind-icon:before {
                    background-position: $member-interface-inherited $offset;
                }
            }
        }
    }
}